Very good!
Black screen bug is gone for me, doesn't even appear when holding Shift-F4 down. Besides that, it seems to be even faster than before, and the slight sound crackling I got before also disappeared.
A different thing that would probably have been important during the investigation is wether the screen resolution in LFS is the same as the desktop one, but as you've fixed it already that's of no relevace anymore
E: DIERR_HANDLEEXISTS still appears for me when using Alt-Tab, but as I never use that anyway that's completely irrelevant.
Black screen bug is gone for me, doesn't even appear when holding Shift-F4 down. Besides that, it seems to be even faster than before, and the slight sound crackling I got before also disappeared.
A different thing that would probably have been important during the investigation is wether the screen resolution in LFS is the same as the desktop one, but as you've fixed it already that's of no relevace anymore
E: DIERR_HANDLEEXISTS still appears for me when using Alt-Tab, but as I never use that anyway that's completely irrelevant.